Combination-lock



NITED STATES Arum* l rrron.`

EMORY W. GOODRICHLOF SOMERVILLE, ASSIGNOR TO GALEN A. PARK-ER,

OF READING, MASSACHUSETTS.

COMBINATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 512,187, dated January 2, 1894.

Application filed January 23. 1893. Serial No. 459,432. (No model.)

To all whom it may concern.'

Beit known that LEMORY W. GooDRIoH, of Somerville, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Combination-Locks, of which the following is a specification.

This invention relates to anim proved combination lock, and is here shown applied to a box for receiving milk delivered in receptacles, and also is adapted for receiving mail matter.

The invention consists in the novel arrangement hereinafter described and claimed.

In the accompanying drawings a construction is shown by which the invention may be carried out.

Figure l shows a front view of the box. Fig. 2 shows a cross section taken on the line 2-2 of Fig. 1. Fig. 3, shows a section of a portion of the box taken on the line 3-3 of Fig. 2. Fig. 4 shows an inside perspective view of the lock on an enlarged scale. Fig. 5 shows a similar perspective of a portion of the lock broken away to disclose the interior construction. Fig. 6 shows a perspective View of one of the securing bolts. Fig. 7 shows a horizontal section on the line 7--7 of Fig. l. Fig. S shows a section of the lock taken on the same line with the bolt represented as withdrawn. Fig. 9 shows a similar View with the bolt-head reversed. Fig. 10 shows the reversed bolt withdrawn.

The letter a, designates a box or receptacle, which has a hinged door, b, infront, and a slot, a', in the upper side and covered by a hinged lid, c. A milk can or other receptacle containing milk may be introduced into the box through the door, b, and mail matter may be inserted through the slot, a', by raising the lid, c. A number of horizontal slots, d, are provided in the door, b, near one side edge of the same, and an out-standing boss, d', surrounds each of said slots. A square bolt. e, occupies each slot, and is formed with a flange or plate, e', which ts against the outer side of the boss, d', and constitutes a means of holding the bolt straight while it is moved in the slot. A finger-piece, e2, is formed on the outer side of the plate, e', and by means of this finger-piece, the bolt may be withdrawn. A spring, f, bears at one end against one side of the slot, and at the other end against the boit, and serves to hold the said bolt in the end of the slot which is nearest the edge of the door. A head, g, is fastened by means of a single screw, g', on the inner end of the bolt, and is formed with a rearwardly and laterally extending catch, g2. A rectangular keeper, h, is fastened on the inside of the box, a., and the bolt-heads, g,oc cupy the opening in this keeper when the door is closed. The outer side of one of the side-bars of the keeper h, is beveled so that when the door is closed the said catches will snap over the side-bar of the keeper, the springs, f, allowing the bolts to recede in the slots, d, and the door will thereby be locked in its closed position. By loosening the screws g the bolt-heads may be reversed and a certain number of them employed for securing the door, while the others are thrown out of operative relation with the keeper. In this manner a combination may be formed of the bolts which will be known only to a person authorized to open the box.

A bell-crank lever is pivoted to the lower end of the keeper, h. and has a long arm, z', extending behind all the bolt-heads, and a short arm, i', extending toward the side of the box, and provided with a rearwardly projecting lug, i2. Vhen a bolt-head, g, is reversed, its catch, g2, is brought to such a position that it will encounter the long arm, c', of the bell-crank lever upon the withdrawal of the bolt, and move said arm fi, back. Atrip-lever,j, is pivoted to the side of the box, a, and one end rests on the lug, 2, of the bell-crank lever, while the other end carries a pivoted tingenj', held up in alignment with the lever, by a spring, y2. A bell, m, is fastened to the side of the box, and a hammer, 7c, adapted to strike said bell is pivoted at its lower end to the side of the box, and has a lateral arm, 7.9', upon which the finger, j of the trip-lever bears. A spring, a, holds the hammer, 1.1, to-

ward the bell, and a keeper, o, secured to the side of thebox forms a guide in which the hammer may move to a limited extent.

Should some one unfamiliar with the coinbination of bolts attempt to open the door, he would in all probability withdraw one of the IOO reversed bolts, which would move the long arm, c', of the bell-crank lever, thereby depressing the rear end of the trip-1ever,j, and causing the finger, j', by bearing upon the lateral arm, lo of the hammer, to move said hammer away from the bell, and then pass the end of the said lateral arm, 7c', whereupon the spring, n, returns the hammer against the bell and sounds the alarm. A spring, p, returns the bell-crank lever to its normal position, and the ngerj, of the trip-lever turning on its pivot, takes position again on the upper side of the lateral arm, 7c of the hammer, thus restoring the parts to their normal position ready to be again operated upon another attempt being made to open the door. A bar, q, fastened to the door serves to guide the long arm, i', of the bell-crank lever in its backward movement.

It will be seen that by the use of this combination lock pilfering Iche contents of the box will be prevented. The combination may be varied as often as advisable by lie-arranging the bolt-heads.

While I have here shown the lock applied to the door of a box, it is evident it may be employed in other relations and therefore I do not limit myself to the arrangement and use of the lock as shown and described.

Having thus explained the nature of the invention and described a way of constructing and using the same, though Without attempting to set forth all of the forms in which it may be made or all of the modes of its use, it is declared that what is claimed is- 1. A combination lock comprising in its construction a plurality of bolts having reversible heads capable of being set for engagement with a keeper or reversed so as not to engage the same, and an alarm arranged to be tripped by the reversed bolts, substantially as and for the purposedescribed.

2. A combination lock comprising in its construction a plurality of bolts having reversible heads capable of being set for engagement with a keeper or reversed so as not to engage the same, a bell, a hammer to strike said bell, and a lever arranged to be engaged by the reversed bolts, and trip the bell hammer, substantially as and for the purpose described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 20th day of January, A. D. 1893.

EMoRY W. GooDRIoH.

Witnesses:

A. D. HARRIsoN, ARTHUR W. CRossLEY. 

